Design method of novel wide-breadth voltage-regulating distribution transformer

Abstract

The invention discloses a design method of a novel wide-breadth voltage-regulating distribution transformer, and aims to provide a design method of a novel wide-breadth voltage-regulating distributiontransformer which is reliable in operation. The method comprises the following steps: step 1, selecting transformer districts which cannot maintain normal voltage amplitude of a low-voltage side fromthe transformer districts in grid-connected operation, and comparing and analyzing voltage regulation modes and control strategies of the transformer districts to obtain a wide-width voltage regulation distribution transformer meeting requirements; step 2, by researching a control strategy of the wide-width voltage-regulating distribution transformer, adding a corresponding unit on a functional module, thereby realizing self-adaptive control of the distribution transformer and automatic treatment of low voltage; step 3, enabling the wide-width voltage-regulating distribution transformer to have self-adaptive operational capability by designing the wide-width voltage-regulating distribution transformer and optimizing a control strategy; and step 4, screening and optimizing a self-adaptivecontrol module through PSCAD-based simulation modeling and full-working-condition fault analysis, thereby improving the low-voltage governance capability of the low-voltage transformer area in the distribution network.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a design method of a novel wide-range voltage regulation distribution transformer. Background technique [0002] At present, there are four main methods of low-voltage control measures in the distribution network: (1) autotransformer boost; (2) increase the output voltage of the distribution transformer in the station area to boost; (3) extend the 10kV line and add a new distribution transformer Step-up; (4) Step up by installing a low-voltage line compensating voltage regulator; the above-mentioned four methods have shortcomings, and the details are as follows: using an autotransformer to directly step up the voltage, under the same capacity, the device has many consumables, heavy weight, and volume Large, not only the cost is high, but also because of the heavy weight, the installation cost is also greatly increased; the use of increasing the output voltage of the distribu...

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